Spontaneous class switching and B cell hyperactivity increase autoimmunity against intracellular self antigen in Lyn-deficient mice.
IgG autoantibodies cause pathology due to their ability to bind self antigens. However, the extent to which the initial B cell activation and isotype switching is antigen-driven is unclear and it has been widely proposed that intrinsic B cell hyperactivity may be a contributing factor. To explore this issue we generated mice with B cell hyperactivity secondary to deficiency in the src kinase Lyn that also expressed a gene-targeted anti-hen egg lysozyme Ig construct (VDJkappa) capable of class...Expand abstract
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